We sell 3D models for two very different jobs: files you print, and assets you drop into a game or render. People sometimes buy one expecting the other, so this article explains the difference — and how one design can become both.
A print-ready model
A printer needs a solid. The file (usually STL or 3MF) describes a closed surface at real-world scale in millimetres. What matters:
- Watertight geometry. Every surface closed, no holes, no overlapping shells — the slicer must know inside from outside.
- Real thickness everywhere. A wall in a game can be zero millimetres thick; a printed wall needs at least about 1.2 mm. Fine details need to be big enough to print.
- Scale. The model is the size of the finished object. A mask is mask-sized.
- No textures. Colour and surface detail have to be geometry. A “scratched metal” texture map prints as smooth plastic; actual scratches modelled into the surface print as scratches.
- Polycount barely matters. A print file can be millions of triangles; the slicer doesn’t care. More triangles simply mean smoother curves.
A game-ready model
A game engine renders the model sixty times a second, so everything is about efficiency and how light behaves on the surface:
- A polygon budget. Clean topology, usually quads, with as few triangles as the silhouette needs. Our Tachyon Enhancer is about 180,000 triangles — dense for a prop, because it is meant for close-ups.
- UVs. The surface is unwrapped flat so textures can be painted onto it without stretching.
- PBR textures. Base colour, normal, roughness, metallic and ambient-occlusion maps carry the detail a print would need geometry for. Ours ship at 4K.
- Correct pivot, scale and orientation for the engine, and often LODs (lower-detail versions for distance).
- Rig or animation where the object moves — the Enhancer’s legs fold between a standing and a laying position inside the FBX.
How one design becomes both
Our workflow usually starts with a high-resolution sculpt or a CAD model. From there the two versions go separate ways:
- For print: merge everything into solids, add thickness where the sculpt was a shell, check minimum feature sizes, decimate to a sane triangle count, split into printable pieces if it is larger than the bed, export STL/3MF.
- For games: retopologise to a clean low-poly mesh, unwrap UVs, bake the high-resolution detail into normal and AO maps, paint materials in Substance Painter, export FBX/OBJ with the texture set.
Going the other way is possible too: a game asset can be made printable by giving it thickness and closing it up, and a print file can be retopologised for real-time use. Both are work, which is why a listing says clearly which one you are getting.
What to check before you buy a model
- Format: STL/3MF/STEP means print; FBX/OBJ with textures means real-time.
- Scale and units for print files; triangle count and texture resolution for game assets.
- What’s included: pre-split parts? Texture maps? Animations?
- Licence: personal use, or commercial use in your own product? Every listing in our shop states it.
Browse the downloadable models to see both kinds side by side, or look at Projects for how a piece was made from sculpt to finished asset.
